Preparation and characterization of magnetic polyimide hybrid thin films

Sun, Jia; Zhang, Qiuyu; Guo, Fang; Gu, Junwei; Zhang, Junping

doi:10.1002/app.35412

Cited by 8 publications

(5 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thin nanocomposite films at high filler content ( Figure 4 a,b) are mechanically fragile [ 30 ]. As a result, they are embedded frequently within a more durable matrix.…”

Section: Resultsmentioning

confidence: 99%

Single-Step Fabrication of Polymer Nanocomposite Films

Blattmann

Pratsinis

2018

Materials

View full text Add to dashboard Cite

Polymer nanocomposites are employed in (micro)electronic, biomedical, structural and optical applications. Their fabrication is challenging due to nanoparticle (filler) agglomeration and settling, increased viscosity of blended solutions and multiple tedious processing steps, just to name a few. Often this leads to an upper limit for filler content, requirements for filler–polymer interfacial chemistry and expensive manufacturing. As a result, novel but simple processes for nanocomposite manufacture that overcome such hurdles are needed. Here, a truly single-step procedure for synthesis of polymer nanocomposite films, structures and patterns at high loadings of nanoparticles (for example, >24 vol %) for a variety of compositions is presented. It is highly versatile with respect to rapid preparation of films possessing multiple layers and filler content gradients even on untreated challenging substrates (paper, glass, polymers). Such composites containing homogeneously dispersed nanoparticles even at high loadings can improve the mechanical strength of hydrogels, load-bearing ability of fragile microstructures, gas permeability in thin barriers, performance of dielectrics and device integration in stretchable electronics.

show abstract

“…Thin nanocomposite films at high filler content ( Figure 4 a,b) are mechanically fragile [ 30 ]. As a result, they are embedded frequently within a more durable matrix.…”

Section: Resultsmentioning

confidence: 99%

Single-Step Fabrication of Polymer Nanocomposite Films

Blattmann

Pratsinis

2018

Materials

View full text Add to dashboard Cite

show abstract

“…This conclusion is supported by other research, which synthesized superparamagnetic polyimide nanocomposites with magnetite content as filler, obtaining also an improvement of thermal properties compared to neat polyimide on increase in magnetite content. On the other hand, Sun and coworkers obtained magnetic polyimide hybrid thin films from pyromellitic dianhydride‐4,4′‐oxydianiline and Fe 3 O 4 magnetic nanoparticles via thermal imidization. The researchers demonstrated an increase of mechanical stress with increase of magnetic filler content.…”

Section: Resultsmentioning

confidence: 99%

Influence of two structural phases of Fe₃O₄and γ-Fe₂O₃on the properties of polyimide/iron oxide composites

Nica¹,

Nica

Grigoraş³

et al. 2015

Polym. Int.

View full text Add to dashboard Cite

Partially aliphatic polyimide/iron oxide composites based on the poly(amic acid) from 5-(2,5-dioxotetrahydro-3-furyl)-3-methyl-3-cyclohexene-1,2-dicarboxylic acid anhydride and 4,4 ′ -oxydianiline with iron oxide in different weight percentages were obtained. The structural phases of the transition of magnetite to maghemite occurring in these composites, at different temperatures, are discussed. The physical characteristics, including magnetic, thermal, structural and morphological properties, evaluated using X-ray diffraction, scanning electron microscopy and thermal analysis, are influenced by the interplay of the filler content and the structural changes of the composite. The X-ray diffraction patterns of all samples show a cubic structure indexed as magnetite (Fe 3 O 4 ) or maghemite ( -Fe 2 O 3 ). Quantification of these two phases was evidenced by the Rietveld method. The electrical properties analysed under different humidity conditions evidence the potential applicability of these polyimide/iron oxide materials as humidity sensors.

show abstract

“…It is attributed to the excellent compatibility and homogeneous dispersion of Fe 3 O 4 /FePc in the PI matrix. The results show that the studied composite films possess higher Ms value than the other modified Fe 3 O 4 /PI composite films 27,38,39. After the nanoparticles are wrapped with FePC via one-step synthesis method, the coercivity increased from 19.47 Oe for Fe 3 O 4 nanoparticles to 43.67 Oe.…”

mentioning

confidence: 84%

Preparation and magnetic and thermal properties of flexible polyimide films with iron nitrophthalocyanine-coated magnetite microspheres

Liu

Wang

et al. 2015

High Performance Polymers

View full text Add to dashboard Cite

To effectively utilize the one-step solvent-thermal route to prepare iron (Fe)-nitrophthalocyanine/magnetite (Fe 3 O 4 ) hybrid microspheres, we have developed a novel series of flexible Fe 3 O 4 /Fe-phthalocyanine (FePc)/polyimide (PI) composite films with various Fe 3 O 4 /FePc nanoparticle loadings (15, 27, and 40 wt%) and imidized at different temperatures (200 C and 300 C). The morphology and structure of the composite films were monitored using scanning electron microscopy, Fourier transform infrared spectroscopy, and X-ray diffraction, and the hybrid microspheres were found uniformly dispersed in the polymer matrices without any agglomeration. Mechanical and thermal properties of the composites were also investigated. The observed results indicated enhanced thermal stabilities, dramatically increased tensile modulus, and increased glass transition temperatures of the composite films, with the increment in the content of inorganic nanoparticles. Besides that, the Fe 3 O 4 /FePc/PI magnetic films showed higher saturation magnetization (24.33 emu g À1 , 27 wt% Fe 3 O 4 /FePc loading) with high-temperature treatment compared with that of the Fe 3 O 4 /PI film (18.79 emu g À1 , 27 wt% Fe 3 O 4 loading). It proved to be an effective way to prevent Fe 3 O 4 nanoparticles from oxidizing by coating the nanoparticles with organic layer. The flexible composite films can easily be moved under a relatively low magnetic field, indicating them to be the high-performance absorbing materials in potential applications.

show abstract

Preparation and characterization of magnetic polyimide hybrid thin films

Cited by 8 publications

References 21 publications

Single-Step Fabrication of Polymer Nanocomposite Films

Single-Step Fabrication of Polymer Nanocomposite Films

Influence of two structural phases of Fe₃O₄and γ-Fe₂O₃on the properties of polyimide/iron oxide composites

Preparation and magnetic and thermal properties of flexible polyimide films with iron nitrophthalocyanine-coated magnetite microspheres

Contact Info

Product

Resources

About

Preparation and characterization of magnetic polyimide hybrid thin films

Cited by 8 publications

References 21 publications

Single-Step Fabrication of Polymer Nanocomposite Films

Single-Step Fabrication of Polymer Nanocomposite Films

Influence of two structural phases of Fe3O4and γ-Fe2O3on the properties of polyimide/iron oxide composites

Preparation and magnetic and thermal properties of flexible polyimide films with iron nitrophthalocyanine-coated magnetite microspheres

Contact Info

Product

Resources

About

Influence of two structural phases of Fe₃O₄and γ-Fe₂O₃on the properties of polyimide/iron oxide composites